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  4. Which of the following statements is correct with respect to sickle cell anaemia?

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Q. Which of the following statements is correct with respect to sickle cell anaemia?

NTA AbhyasNTA Abhyas 2022

Solution:

Sickle cell anaemia is an autosomal recessive disease. This disease is controlled by a pair of alleles: HbA (normal dominant allele) and HbS (affected recessive allele).
Both male and female have either of the three genotypes:
1. HbA HbA: Normal phenotype.
2. HbA HbS: Normal phenotype.
3. HbS HbS: Diseased phenotype.